package com.dayuanit.dy8.model.Single;

public class Fish {

    private volatile static Fish fish;

    private Fish() {

    }

    public static Fish createFish() {

        if (null == fish) {
            synchronized (Fish.class) {
                if (null == fish) {
                    fish = new Fish();
                }
            }
        }

        return fish;
    }
}
